R horizon
Definition
The R horizon refers to unweathered bedrock that lies beneath all other layers of soil. It consists of solid rock that has not undergone any significant weathering or decomposition.
Related terms
Weathering: The process by which rocks are broken down into smaller particles by physical, chemical, or biological means.
Erosion: The movement and transportation of weathered materials (such as rocks, sediments, or soils) by wind, water, ice, or gravity.
Sedimentation: The deposition or accumulation of eroded materials (such as sand, silt, or clay) in new locations.
"R horizon" appears in:
Additional resources (1)
AP Environmental Science - Unit 4 Overview: Earth Systems and Resources
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Cram Mode
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© 2024 Fiveable Inc. All rights reserved.
AP® and SAT® are trademarks registered by the College Board, which is not affiliated with, and does not endorse this website.